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Finding the Fourth Proportional to 414,776.64, 621,531.09 and 279,339.87

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Solution

The fourth proportional to 414,776.64, 621,531.09 and 279,339.87 is: 418,582.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    414,776.64 : 621,531.09 = 279,339.87 : x
  2. Step 2: Convert to fraction form
    414,776.64/621,531.09 = 279,339.87/x
  3. Step 3: Cross multiply
    414,776.64x = 621,531.09 × 279,339.87
  4. Step 4: Simplify right side
    414,776.64x = 173,618,413,881.56
  5. Step 5: Solve for x
    x = 173,618,413,881.56/414,776.64
  6. Step 6: Final answer
    x = 418,582.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.